{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462493558",
    "entityType": "Track",
    "nonce": "0x078a549ca57fb46a3cbda595dd007051a4bfd786a0d1f4f1e3e39a9d98cfd509",
    "signature": "0x2ea3dd9b31c06505c413b8fe58d048ae60fc9229caabc41d4fab665ec4812d2160d4e4e24ff4bea057f2e39ddddc621d7ecc657fbf45e86a09e1461c24158a6d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}